The Plantronics Blackwire C210-M Headset lets you enjoy crystal clear PC audio anywhere you want. It features Hi-Fi audio with stereo sound that optimizes music and video quality along with soft ear cushions ensuring maximum all day comfort. It has easy volume adjustment settings with +/- and mute button and its SoundGuard® protects against instantaneous sound spikes above 118 dB SPL. This sound reducing headset gives a perfect secure fit along with its digital signal processing technology and its wideband frequency optimizes audio for more natural voice quality.